CN103575482B - The blocking diagnostic equipment of connecting pipe and blocking diagnostic method - Google Patents
The blocking diagnostic equipment of connecting pipe and blocking diagnostic method Download PDFInfo
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- CN103575482B CN103575482B CN201310303865.0A CN201310303865A CN103575482B CN 103575482 B CN103575482 B CN 103575482B CN 201310303865 A CN201310303865 A CN 201310303865A CN 103575482 B CN103575482 B CN 103575482B
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- desired value
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/12—Alarms or signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
Abstract
The blocking diagnostic equipment and the diagnostic method of a kind of connecting pipe are provided.Occur to the time being detected from blocking when reducing blocking drastically development.Differential pressure (pressure) data from differential pressure transmitter (pressure detecting portion) are received by acceptance division.The time series of the differential pressure data of reception is divided into multiple interval to obtain this each interval characteristic quantity representing pressure vibrating state by characteristic quantity operational part.Each described interval characteristic quantity interval according to the certain time to this interval is obtained the desired value representing connecting pipe blocked state by desired value operational part.The desired value that certain time to this interval is interval is done smoothing techniques with regard to each described interval by rate of change operational part, obtains the rate of change of each interval desired value according to the desired value after this smoothing techniques.The blocked state of connecting pipe is judged by detection unit according to the desired value rate of change obtained by rate of change operational part.Use rolling average process, method of least square etc. as the smoothing techniques of rate of change operational part.
Description
Technical field
The pressure that the present invention relates to a kind of mensuration object that will have pressure and rock guides to pressure detecting portion diagnosis pilot
The diagnostic equipment of the blocking of the connecting pipe of the blocking of pipe and blocking diagnostic method.
Background technology
In the past, in process industrial field, such as, in order to process variable being detected and process being controlled, employ
Pressure transmitter and differential pressure transmitter.Pressure transmitter is also referred to as pressure transmitter, and differential pressure transmitter is also referred to as differential pressure and passes
Send device.Pressure transmitter is to measure absolute pressure and gauge pressure, and differential pressure transmitter is the differential pressure between measuring at 2,
It is the process variable mensuration for pressure, flow, liquid level, proportion etc..Typically, use Pressure and Difference Pressure Transmitter (with
Under, be only called transmitter when being referred to as) when process variable is measured, join from the process of the fluid flowing measuring object
The pressure measuring object, by being referred to as the thin pipeline of connecting pipe, is guided to transmitter (pressure detecting portion) by pipe.
In this apparatus structure, the inside of connecting pipe can be attached to owing to measuring the reason solid shape thing sometimes etc. of object,
Connecting pipe is blocked.If once connecting pipe is completely plugged, process variable just cannot correctly determine, therefore will be to complete
Equipment produces considerable influence.But, by pressure transmission to transmitter, thus can block up before owing to connecting pipe is completely plugged
The impact of plug is difficult to manifest in the measured value of process variable.
For this problem, it is not necessary to the pressure transmitter of the Remote seal type of connecting pipe is practical the most.But, adopt
The complete set of equipments being measured process variable with connecting pipe is many, it is desirable to realize the blocking of connecting pipe with online mode
Diagnostic function.
For this problem, the pressure utilizing fluid that has being proposed rocks the side that the blocking to connecting pipe diagnoses
Method and device.
Such as in patent documentation 1, it is shown that according to subtracting of maximum amplitude of fluctuation (difference of maxima and minima) of pressure
It is capable of detecting when the blocking of connecting pipe less.
In patent documentation 2,3, disclose and use pressure or the size rocked of differential pressure and the parameter that calculated by it to leading
The blocking of pressure pipe carries out the device and method detecting and diagnosing.
In patent documentation 4, disclose the reflection according to the standard deviation rocked extracted from differential pressure or power spectral density etc.
The device and method that the state of connecting pipe is diagnosed by the statistic of the size rocked and function.
In patent documentation 5, it is shown that according to number of times that teetertotters that pressure rocks etc., the speed rocked to block into
The device and method of row diagnosis.Additionally, this invention described in patent documentation 5 be not based on pressure or differential pressure rock shake
Width, but be that the invention described in the patent documentation 1～4 from other is different based on speed (frequency) this point rocked,
But this point of rocking utilizing pressure or differential pressure is common.
Prior art literature
Patent documentation 1 Japanese Patent Publication 7-11473 publication
No. 3139597 publications of patent documentation 2 Japanese Patent No.
No. 3129121 publications of patent documentation 3 Japanese Patent No.
Patent documentation 4 Japanese Unexamined Patent Application Publication 2002-538420 publication
Patent documentation 5 Japanese Unexamined Patent Publication 2010-127893 publication
Summary of the invention
The problem that invention is to be solved
But, rock in the apparatus and method of the blocking detecting connecting pipe according to pressure at existing majority, exist from stifled
Until being detected and can producing the such problem of certain time lag after plug occurs.This time lag is because of reason as described below
And produce.
Great majority to the apparatus and method that the blocking of connecting pipe diagnoses are that the pressure utilizing fluid rocks.Because will make
Characteristic (pressure or differential pressure) for irregular fluid uses as the basic data diagnosed, pressure rock the " spy obtained
The amount of levying (representing the characteristic quantity of the vibrating state of pressure) " (such as, the number of times that teetertotters rocked of differential pressure, 1 jump divide
Rock (from rocking that measured value Dp (i-1) of last time and this measured value Dp (i) are obtained.Dp(i)-Dp(i-1))、2
Jump divides and rocks that (1 jump divides the backward difference rocked.From measured value Dp (i-2) of upper last time, measured value Dp of last time (i-1)
And rocking of obtaining of this measured value Dp (i).Dp (i)-2Dp (i-1)+Dp (i-2)) etc.) in also comprise because of blocking with
Outer key element and the deviation that produces.To this end, it is difficult for being intactly used for characteristic quantity diagnosing.
Therefore, diagnosis has utilize by the characteristic quantity that certain interval regular hour obtain " desired value (represents connecting pipe
The desired value of the state of blocking) " (certain interval rolling average of the number of times that such as, teetertotters, 1 jump divide rocked
Fixed interval quadratic sum is average, 2 jumps divide the certain interval quadratic sum rocked averagely).
Now, if elongated by the time interval solving desired value, the deviation of desired value can be suppressed, so diagnosis essence
Degree will rise.And on the other hand, if elongated by the time interval solving desired value, the impact of blocking is by desired value
The time spent till reflection just will be elongated.As result, if if wishing to ensure that diagnostic accuracy to a certain degree,
Before the impact of blocking is reflected by desired value, time to a certain degree will necessitate.Thus, from occurring blocking tested to blocking
Certain time lag will be produced during this till measuring.
Now, in the case of the development the most slowly of blocking, the time lag being detected to blocking from there is blocking is can
With the size ignored, do not become problem.But, in the case of the development faster of blocking, from occurring blocking tested to blocking
Time lag till measuring then will become the size that can not be ignored.
The present invention, precisely in order to solve such problem and make, its object is to, it is provided that one can make blocking sharp
During development occur to block the blocking diagnostic equipment of the connecting pipe that the time lag till being detected reduces from blocking and blocking is examined
Disconnected method.
For solving the means of problem
In order to realize such purpose, the present invention provides the blocking diagnostic equipment of a kind of connecting pipe, and pressure is rocked by its diagnosis
The pressure measuring object guide the blocking of connecting pipe to pressure detecting portion, it is characterised in that including: acceptance division, it connects
Receive the pressure data coming from described pressure detecting portion；Characteristic quantity operational part, its pressure data that will be received by described acceptance division
Time series be divided into multiple interval, and obtain the characteristic quantity of the vibrating state of the described pressure representing this interval each；Index
Value operational part, it, for each described interval, is asked according to the described characteristic quantity that the regular hour to this interval is interval
Go out the desired value of the blocked state representing described connecting pipe；Rate of change operational part, it is for each described interval, to this district
The described desired value in the regular hour interval till between carries out smoothing techniques, asks according to the desired value after this smoothing techniques
Go out the rate of change of the desired value in each interval；And detection unit, it is according to the change of the desired value obtained by described rate of change operational part
Rate, judges the blocked state of described connecting pipe.
The present invention is in order to that produce when making blocking develop sharp, from blocking the time lag contracting occurring to block till being detected
Little, and it is conceived to represent the rate of change of the desired value of the state of the blocking of connecting pipe.It is conceived to fact of the rate of change of desired value
As follows: when blocking development, desired value is changed towards abnormal scope by normal scope.Now, if block sends out
When exhibition degree is situation drastically, although produce above-mentioned time lag, but desired value changes within a short period of time.In short-term
In change that is, although when observing with desired value be difference as small change, but see not when rate of change becomes usual
Value big as arriving.And, rate of change become the big moment mostly be desired value reach abnormal ranges moment to a certain degree it
The front moment.Learn as result, compared with being become by desired value and carrying out detection beyond scope, by desired value
Rate of change becomes the situation big compared with general value and detects, then can earlier detect the development of blocking drastically.
And, inventors have found out following situation: be not the rate of change merely obtaining desired value, but utilize mobile flat
All smoothing techniques such as process and method of least square, on the basis of having carried out smoothing with regular hour amplitude to desired value
It is effective for obtaining rate of change again.The reason that must obtain rate of change on the basis of smoothing is as follows: obtaining rate of change
When, if if simply merely taking difference (forward difference, backward difference), then exist cannot the most only try to achieve because of
The problem of the rate of change blocked and produce.Its reason is, uses fluid (irregularly) and the deviation of data that causes is comprised
In desired value.Even if the deviation of desired value is less, if but merely being asked difference (forward difference, backward by this desired value
Difference) if, also tend to be that the deviation of difference shows bigger than the deviation of desired value.
As for once take difference, deviation will become the example that big situation illustrates, it is contemplated that such as Figure 16
A data that the value of the scope of p-0.5 to 0.5 as shown in () obtains randomly.Number shown in (a) of Figure 16
According to backward difference become as (b) of Figure 16, this scope is-1 to 1, and standard deviation is also original by becoming ratio
Data are big.Owing to there is problems in that, in order to utilize rate of change that blocking is detected, it is necessary to removing desired value
In deviation on the basis of, only take out the rate of change produced because of blocking.
By obtaining rate of change on the basis of smoothing, from desired value devious, deviation can be removed, one
The change of the desired value produced because the blocking impact of connecting pipe originally thinking concern is only taken out on limit.Due to except being conceived to index
The rate of change of value, additionally it is possible to successfully only take out the change produced because of the blocking impact of connecting pipe from the rate of change of desired value,
Occurring to block the time lag till being found reduce from blocking when blocking therefore can be made to develop sharp.
Additionally, in the present invention, although according to the rate of change of desired value, the blocked state of connecting pipe is judged, but also may be used
It is combined with the judgement by the judgement of the rate of change according to this desired value with according to desired value.Like this, though blocking
Whether fast development is slow/, can more quickly detect the blocking of wider scope.
It addition, in the present invention, the device as differential pressure transmitter or pressure transmitter, pressure or differential pressure detected
Or method is referred to as pressure detecting portion, the pressure data coming from pressure detecting portion comprises differential pressure data.That is, pressure detecting portion
If if detecting differential pressure, then pressure data means the differential pressure between 2, and pressure detecting portion is if to pressure
If power detects, then pressure data means absolute pressure or gauge pressure.In the present invention, not only by absolute pressure,
Gauge pressure, also comprises differential pressure and is referred to as pressure data.
It addition, the present invention is not as the blocking diagnostic equipment of connecting pipe, and the blocking diagnostic method as connecting pipe is also permissible
Realize.
The effect of invention
According to the present invention, because being that the time series of the pressure data received by acceptance division is divided into multiple interval, ask
Go out to represent the characteristic quantity of the state rocked of the pressure in this interval each, for each of each interval, according to this district
The characteristic quantity in the regular hour interval till between obtains the desired value of the state of the blocking representing connecting pipe, for respectively
Interval each, the desired value interval to the regular hour till this interval carries out smoothing techniques, puts down according to this
Desired value after cunningization process obtains the rate of change of the desired value in each interval, according to the change of this desired value tried to achieve
Rate, judges the blocked state of connecting pipe, it is possible to only take out originally want pay close attention to because of the blocking of connecting pipe
Impact and the change of desired value that produces, when blocking can be made to develop sharp to occur to blocking from blocking detected
Time lag to reduces.
Accompanying drawing explanation
Fig. 1 is the skeleton diagram of an example of the differential pressure mensuration system of the blocking diagnostic equipment of the connecting pipe using the present invention.
Fig. 2 is the main of the embodiment (embodiment 1) of the 1st of the blocking diagnostic equipment of the connecting pipe illustrating the present invention
The block diagram of part.
Fig. 3 is to illustrate that differential pressure shown in Fig. 1 measures the connecting pipe of system and produces the blocking of doubtful property and the actual difference that is measured to
The figure of pressure data.
Fig. 4 is the schematic diagram of the computing situation of the characteristic quantity of the characteristic quantity operational part in embodiment 1.
Fig. 5 is the schematic diagram of the computing situation of the desired value of the desired value operational part in embodiment 1.
Fig. 6 is the schematic diagram of the computing situation of the desired value rate of change of the rate of change operational part in embodiment 1.
Fig. 7 is to utilize the rate of change operational part in embodiment 1 carry out smoothing techniques (rolling average process) and obtain
The schematic diagram of the change of desired value rate of change.
Fig. 8 is not carry out smoothing techniques, the signal of the change of the desired value rate of change tried to achieve as simple backward difference
Figure.
Fig. 9 is the schematic diagram of the computational methods of the backward difference of the desired value as reference.
Figure 10 is the schematic diagram of the change of the desired value utilizing the desired value operational part in embodiment 1 to obtain.
Figure 11 for rate of change operational part be suitable for method of least square as smoothing techniques to obtain desired value rate of change time
The explanatory diagram of (embodiment 2) example.
Figure 12 is the schematic diagram of the computing situation of the desired value rate of change of the rate of change operational part in embodiment 2.
Figure 13 is to utilize the rate of change operational part in embodiment 2 carry out smoothing techniques (method of least square) and try to achieve
The schematic diagram of the change of desired value rate of change.
Figure 14 is the schematic block diagram of the major part of the blocking diagnostic equipment of the connecting pipe of embodiment 3.
Figure 15 is the relation of the development speed of choke detecting method and the blocking representing and utilizing desired value/desired value rate of change
Figure.
Figure 16 is that the deviation when taking difference will be become the figure that big situation illustrates.
Detailed description of the invention
Hereinafter, with reference to the accompanying drawings embodiments of the present invention are described in detail.
Fig. 1 is to be shown as using the differential pressure of an example of the system of the blocking diagnostic equipment of the connecting pipe of the present invention to measure system
Skeleton diagram.In this differential pressure mensuration system, differential pressure transmitter 5 to by by 1 bifurcated of process pipe arrangement connecting pipe 3,
The pressure differential of 4 fluids guided detects.Additionally, within the system, process pipe arrangement 1 is provided with throttle orifice 2,
Before and after clipping this throttle orifice 2, position connecting pipe 3,4 is bifurcated.
(embodiment 1)
Fig. 2 is the major part of the 1st embodiment (embodiment 1) of the blocking diagnostic equipment of the connecting pipe of the present invention
Block diagram.The blocking diagnostic equipment 100 of this connecting pipe includes: acceptance division 6, characteristic quantity operational part 7, desired value operational part 8,
Rate of change operational part 9, detection unit 10, datum characteristic storage part 11 and alarm output unit 12.
Acceptance division 6 receives the differential pressure data coming from differential pressure transmitter 5.Come from the differential pressure data phase of this differential pressure transmitter 5
When in the pressure data coming from pressure detecting portion described in the present invention.The difference that characteristic quantity operational part 7 will be received by acceptance division 6
The time series of pressure data is divided into multiple interval, obtains the characteristic quantity of the vibrating state of the pressure representing this interval each.?
In this embodiment, it is assumed that be to obtain the number of times that teetertotters rocked as characteristic quantity.Additionally, about obtaining rock upper and lower
The method rocking number of times, because the applicant is having its concrete method described in the patent documentation 5 of first motion, so at this
Detailed description is omitted.
Desired value operational part 8 obtains the characteristic quantity tried to achieve by characteristic quantity operational part 7, to interval each described, according to being somebody's turn to do
The characteristic quantity in the regular hour interval till interval obtains the desired value of the blocked state representing connecting pipe.This embodiment party
In formula, as desired value, obtain average (rolling average) of characteristic quantity in regular hour interval as desired value.
Rate of change operational part 9 obtains the desired value tried to achieve by desired value operational part 8, to interval each described, and will be to this district
Regular hour till between interval desired value carries out smoothing techniques, asks according to the desired value by this smoothing techniques
Go out the rate of change (desired value rate of change) of the desired value in each interval.
" the desired value rate of change " tried to achieve by rate of change operational part 9 is not by difference (forward difference and the backward difference of desired value
Grade) the simple rate of change that obtains, but " the index of interval to the regular hour (certain sample number or certain period)
Value " carry out smoothing techniques and the rate of change tried to achieve.In the present embodiment, rate of change operational part 9 is obtained as described below
Desired value rate of change.
(1) desired value obtained by desired value operational part 8 is moved average treatment as smoothing techniques.
If set i-th desired value as x [i] (i=1,2,3 ...), set moving average as N, set jth move
Dynamic meansigma methods be y [j] (j=N, N+1, N+2 ... if), then y [j]=(x [j]+x [j-1]+x [j-2]
+……+x[j-N+1])/N。
(2) backward difference is obtained, as desired value rate of change according to the value obtained by (1).
If set jth moving average as y [j] (j=N, N+1, N+2 ...), set kth desired value change
Rate be z [k] (k=N+1, N+2, N+3 ... if), then z [k] :=y [k]-y [k-1].
Detection unit 10 when datum characteristic computing and judge time its function be different, carry out following action.
During datum characteristic computing
(1) according to being obtained average value mu, standard deviation by the desired value rate of change obtained by the differential pressure data blocked when not producing
Difference σ.
(2) " μ-3 σ ", " μ+3 σ " are obtained according to average value mu, the standard deviation obtained by (1).
(3) " μ ± 3 σ " that will be obtained by (2) exports to datum characteristic storage part 11 as datum characteristic.
During judgement
Check by wanting that whether the desired value rate of change obtaining the differential pressure data judged with or without blocking is from datum characteristic
In the range of the datum characteristic " μ ± 3 σ " that storage part 11 obtains, judge that the blocked state of connecting pipe has unchanged.?
In the case of this, when desired value rate of change is in the range of " μ ± 3 σ ", decide that " blocked state of connecting pipe does not has
Change ", when desired value rate of change is outside the scope of " μ ± 3 σ ", then judge " blocked state of connecting pipe changes ".
The datum characteristic " μ ± 3 σ " obtained from detection unit 10 when datum characteristic computing is entered by datum characteristic storage part 11
Row storage, by judge time, datum characteristic computing time storage datum characteristic " μ ± 3 σ " export to detection unit 10.
Alarm output unit 12 is according to the result of determination coming from detection unit 10, it is determined that for " blocked state of connecting pipe has change
Change " time, starting to export blockage alarm, output blockage alarm is until alarm is reset the most constantly.Blockage alarm quilt
During output, it is considered as " abnormal (blocking occurs) ".When blockage alarm is not output, it is considered as " normal (without blocking) ".
Fig. 3 shows that connecting pipe produces the blocking of doubtful property and the actual differential pressure data that is measured to.This differential pressure data is as follows:
The first half data of 600 seconds are without the data (normal data) during blocking, the data when data of later half 600 seconds are to have blocking
(abnormal data).Therefore, if this differential pressure data, it is considered as there occurs blocking at the 600th of data the second.
The blocking diagnostic equipment 100 of connecting pipe is received this differential pressure data by acceptance division 6, and the blocking to connecting pipe diagnoses.
Hereinafter, just the computing flow process of each several part in the blocking diagnostic equipment 100 of connecting pipe is come the blocking diagnosing connecting pipe
Situation illustrates.
Fig. 4 is the schematic diagram of the computing situation of the characteristic quantity of characteristic quantity operational part 7.Characteristic quantity operational part 7 will be by acceptance division 6
The time series of the differential pressure data received is divided into multiple interval, obtains the number of times that teetertotters rocked as representing this district each
Between the characteristic quantity of vibrating state of pressure.In this instance, using 40 data as 1 interval, differential pressure data is carried out
Segmentation, obtains the number that teetertotters back rocked in this interval each as characteristic quantity.By tried to achieve by this feature amount operational part 7
Characteristic quantity delivers to desired value operational part 8.
Fig. 5 is the schematic diagram of the computing situation of the desired value of desired value operational part 8.Desired value operational part 8 obtains by characteristic quantity
The characteristic quantity that operational part 7 is tried to achieve, comes each described interval characteristic quantity interval according to the regular hour to this interval
Obtain the desired value of the blocked state representing connecting pipe.In this instance, using 40 data as 1 interval, obtain each
Average (rolling average) of multiple (being 40 data in the example of the figure) characteristic quantity in this interval, obtains this average (shifting
Dynamic average) as desired value.The desired value tried to achieve by this desired value operational part 8 is delivered to rate of change operational part 9.
Fig. 6 is the schematic diagram of the computing state of the desired value rate of change of rate of change operational part 9.Rate of change operational part 9 obtain by
The desired value that desired value operational part 8 is tried to achieve, to each described interval, the finger interval by the regular hour to this interval
Scale value carries out smoothing techniques, the desired value processed according to this being smoothed, and obtains the rate of change of the desired value in each interval.
In this instance, using 40 data as 1 interval, obtain in this interval each multiple (be 10 in the example of figure
Individual data) average (rolling average) of desired value, obtain its average with the adjacent interval desired value similarly tried to achieve
Difference between (rolling average), as the desired value rate of change in this interval.In this instance, using adjacent interval as rear
Interval, obtain backward difference as desired value rate of change.
The desired value rate of change tried to achieve by rate of change operational part 9 is sent to detection unit 10.Datum characteristic storage part 11 stores
The datum characteristic " μ ± 3 σ " obtained when having datum characteristic computing.Detection unit 10 reads in this datum characteristic storage part 11 and deposits
Average ± 3 σ of the datum characteristic " μ ± 3 σ " of storage, i.e. normal data, and check the finger coming from rate of change operational part 9
Whether scale value rate of change is in the range of datum characteristic " μ ± 3 σ ".If here, desired value rate of change is in " μ ± 3
σ " in the range of if, it is determined that portion 10 is it is determined that " blocked state of connecting pipe is not changed in "；If desired value changes
Rate is outside the scope of " μ ± 3 σ ", it is determined that portion 10 is then judged to " blocked state of connecting pipe changes ".
Fig. 7 shows and is carried out smoothing techniques (rolling average process) the desired value change obtained by rate of change operational part 9
The change of rate.Fig. 8 shows the index not carrying out smoothing techniques and obtain as simple backward difference (seeing Fig. 9)
The change of value rate of change.In the case of not carrying out smoothing techniques and obtaining desired value rate of change, as shown in Figure 8, usually
A certain amount of change can be produced, miss the change caused because of the generation of blocking.To this, carry out smoothing techniques and (move
Dynamic average treatment) and if obtaining desired value rate of change, as it is shown in fig. 7, only time-bands after blocking drastically just occurs
Produce the large change exceeding threshold value.In this instance, after blocking occurs 30 seconds (starting the 630th second from data), threshold
The scope of value rate of change deviation " μ ± 3 σ ", blocking is i.e. detected.In this case, blocking is occurred to from blocking
It is detected, produces the time lag of 30 seconds.
Figure 10 shows the change of the desired value obtained by desired value operational part 8.The finger obtained by this desired value operational part 8
Scale value is from about 600 seconds to about 800 seconds in continuous downward trend, and before and after 800 seconds, downward trend settles out gradually.Thus
Understand, if utilizing this desired value to carry out jam detection, being reflected by desired value to the impact blocked, will take for the time, from
Blocking occurs to block be detected and will produce time lag to a certain degree.
For this desired value, using average ± 3 σ of normal data as datum characteristic, when become normal data average ± 3
The when of outside the scope of σ, then it is judged to there occurs blocking.In this instance, (open from data after blocking occurs 50 seconds
Begin the 650th second), desired value operational part 8 average ± 3 σ of the desired value deviation normal data obtained, blocking is the most detected
Go out.In this case, occur to blocking from blocking and be detected, produce the time lag of 50 seconds.
The change of the change of the desired value rate of change shown in Fig. 7 with the desired value shown in Figure 10 is compared and understands, at this
In embodiment, the desired value rate of change obtained by rate of change operational part 9 by use, successfully will occur to block up from blocking
The time lag that plug is detected foreshortened to 30 seconds from 50 seconds, for about 60% during service index value.
(embodiment 2)
In embodiment 1, process the smoothing techniques as rate of change operational part 9 with rolling average and obtained desired value change
Rate, in embodiment 2, has obtained desired value rate of change with method of least square as smoothing techniques.Additionally, at this
In embodiment 2, simply the inter-process of rate of change operational part 9 is different, and shown in its structure and Fig. 2 is identical.For
This, also illustrate by the structure shown in Fig. 2 embodiment 2.
In embodiment 2, for the desired value obtained from desired value operational part 8, rate of change operational part 9 is with regard to each institute
State interval, the desired value that the regular hour to this interval is interval is suitable for method of least square as smoothing techniques, general
The slope of the straight line obtained is as the desired value rate of change in this interval.
It is suitable for example when method of least square obtains desired value rate of change figure 11 illustrates.In this instance, by time certain
Between the interval amount being set to 10 data, the desired value of these 10 data volumes is suitable for method of least square as smoothing techniques.
If it is if the 1st～the 10th desired value is used method of least square, shown in solid by obtaining in (a) of Figure 11
Straight line.Similarly, if desired value to be staggered 1 data and employing method of least square every time, Figure 11 is just obtained
(b)～(d) as straight line.
For later data, 1 data that every time staggers are while repeating same process.By the straight line that so obtains
Slope is as desired value rate of change.The computing state of the desired value rate of change of the rate of change operational part 9 in this embodiment 2 exists
Shown in Figure 12.
The desired value rate of change tried to achieve by this rate of change operational part 9 is sent to detection unit 10.Datum characteristic storage part 11 stores
The datum characteristic " μ ± 3 σ " obtained when having datum characteristic computing.Detection unit 10 reads institute in this datum characteristic storage part 11
The datum characteristic " μ ± 3 σ " of storage, i.e. average ± 3 σ of normal data, and check and come from rate of change operational part 9
Whether desired value rate of change is in the range of datum characteristic " μ ± 3 σ ".If here, desired value rate of change is at " μ
± 3 σ " in the range of if, it is determined that portion 10 decides that " blocked state of connecting pipe is unchanged "；If desired value changes
Rate outside the scope of " μ ± 3 σ ", then judges " blocked state of connecting pipe changes ".
Figure 13 shows and is carried out smoothing techniques (method of least square) by the rate of change operational part 9 in embodiment 2 and asked
The change of the desired value rate of change obtained.As embodiment 1 illustrates, obtain finger not carrying out smoothing techniques
(see Fig. 8) in the case of scale value rate of change, usually can produce a certain amount of change, and cannot hold because of the generation of blocking
And the change caused.To this, if obtaining desired value rate of change again after smoothing techniques (method of least square),
As shown in figure 13, only the large change of threshold value is exceeded in the time-bands generation after just occurring that blocks drastically.In this instance,
After blocking occurs 30 seconds (starting the 630th second from data), the scope of desired value rate of change deviation " μ ± 3 σ ",
Blocking is i.e. detected.In this case, occur to blocking from blocking and be detected, produce the time lag of 30 seconds.
Preferably in 2, also understand compared with the change of the desired value shown in Figure 10, transported by rate of change by using
The desired value rate of change that calculation portion 9 obtains, successfully foreshortens to occurring to block the time lag being detected from blocking from 50 seconds
30 seconds, for about 60% during service index value.
(embodiment 3)
In embodiment 1,2, only determine whether connecting pipe with the desired value rate of change obtained by rate of change operational part 9
Blocking, but in embodiment 3, judgement and the employing of the desired value rate of change obtained by rate of change operational part 9 will be used
The judgement of the desired value obtained by desired value operational part 8 is combined.
Figure 14 is the block diagram of the major part of the blocking diagnostic equipment 100 of the connecting pipe illustrating embodiment 3.Embodiment party
In formula 3, not only the desired value rate of change obtained by rate of change operational part 9 is delivered to detection unit 10, but also will be by index
The desired value that value operational part 8 obtains also delivers to detection unit 10.
Detection unit 10 when datum characteristic computing from judge time its function be different, carry out following action.
During datum characteristic computing
(1) average value mu, standard deviation are obtained according to the desired value rate of change obtained by the differential pressure data blocked when not occurring.
(2) " μ-3 σ ", " μ+3 σ " are obtained according to average value mu, the standard deviation obtained by (1).
(3) average value mu is obtained according to the desired value that obtained by the differential pressure data blocked when not occurring ', standard deviation '.
(4) according to the average value mu that obtained by (3) ', standard deviation ' obtain " μ '-3 σ ' ", " μ '+3 σ ' ".
(5) " μ ± 3 σ " that will be obtained by (2) and (4), " μ ' ± 3 σ ' " special to benchmark as datum characteristic output
Property storage part 11.
During judgement
Check whether the desired value rate of change to carry out with or without the differential pressure data that blocking judges obtains is storing from datum characteristic
In the range of the datum characteristic " μ ± 3 σ " that portion 11 obtains, also to check from the differential pressure data carried out with or without blocking judgement
Whether the desired value obtained in the range of datum characteristic " μ ' ± 3 σ ' ", determines whether blocking.
In this case, when desired value rate of change, in the range of " μ ± 3 σ " and desired value is at " μ ' ± 3 σ ' "
In the range of time, it is determined that " normal (blocked state of connecting pipe unchanged, blocking also do not occur) ", in addition
When situation, i.e. desired value rate of change are outside the scope of " μ ± 3 σ " or desired value is in the scope of " μ ' ± 3 σ ' "
Outside time, then be judged to " abnormal (blocked state of connecting pipe changes or there occurs blocking) ".
Preferably in 3, it is due to sending out of blocking slowly by the reason that desired value rate of change and desired value use in the lump
Exhibition desired value rate of change cannot detect, and is necessary to utilize desired value to carry out the reason judged.By referring to except using
Scale value, goes back service index value rate of change, no matter the development speed of then blocking whether, can more quickly detect wider model
The blocking enclosed.
Figure 15 represents the pass between the choke detecting method and the development speed of blocking that utilize desired value/desired value rate of change
System.Utilize the choke detecting method of desired value rate of change, although in the case of the blocking of connecting pipe develops faster, it is possible to relatively
Early detect, in the case of development development is relatively slow, then cannot detect.On the other hand, the jam detection of desired value is utilized
Method, although even if also being able to detect in the case of the blocking of connecting pipe is relatively slow, but development speed faster in the case of,
Though can detect will be slower.By by 2 kinds of choke detecting methods and with just learning from other's strong points to offset one's weaknesses.But detection unit 10 is the most sharp
It is the one of embodiments of the present invention by desired value, is not the necessary element of the present invention.
Additionally, in the above-described embodiment, using by pressure detecting portion as differential pressure transmitter, acceptance division receive and come from
It is illustrated as a example by the differential pressure data of this differential pressure transmitter, but using pressure detecting portion as pressure transmitter, acceptance division connects
In the case of receipts come from the pressure data of this pressure transmitter, the diagnosis of the blocking of connecting pipe can be carried out similarly.
It addition, in the above-described embodiment, using use pressure transmitter or differential pressure transmitter as pressure detecting portion, by position
Acceptance division reception in the blocking diagnostic equipment of the connecting pipe outside transmitter comes from the data instance of these transmitters and carries out
Explanation but it also may pressure detecting portion is set to the pressure transducer within transmitter or differential pressure pick-up, by transmitter
The acceptance division in portion receives the output of this sensor, and carries out a part or even whole computings inside transmitter.
It addition, in the above-described embodiment, described in patent documentation 5, by pressure teetertotter number of times as
Characteristic quantity, is illustrated as a example by the method by this feature figureofmerit value, but the enforcement of the present invention is not limited to the method.
As long as the present invention can be suitable for if blocking desired value based on the connecting pipe that pressure rocks, 1 jump of pressure/differential pressure divides
The quadratic sum rocked is average, 2 jumps divide that the quadratic sum rocked is average, the difference etc. of maximum and minima, existing method institute
Other the desired value used may be by.
Such as, the example can being listed below as " characteristic quantity ", " desired value ", " desired value rate of change ", " datum characteristic "
Son.
The example of " characteristic quantity ": the number of times that teetertotters that rocks, 1 jump divide rock, 2 jumps divide rock, shaking of rocking
The size of width.
The example of " desired value ": certain interval rolling average of the number of times that teetertotters rocked included in sample, 1
Jump divides that the quadratic sum rocked is average, 2 jumps divide the quadratic sum rocked is average, rock dispersion, maximum and minimum it
Difference, the size of high-frequency component of power spectrum.
The example of " desired value rate of change ": carried out the slope of the data that simple rolling average processes, be weighted moving
The slope of the data of dynamic average treatment, the method for least square slope of the straight line tried to achieve, spline function/Gaussian function is utilized to enter
The slope of data of smoothing, maximum and the slope (variable quantity) of difference of minimum, the high-frequency component of power spectrum are gone
The slope (variable quantity) of size.
The example of " datum characteristic ": the maximum of " desired value rate of change ", minima, meansigma methods ± 3 × standard deviation.
(extension of embodiment)
Above, describe the present invention with reference to embodiment, but the present invention is not limited to above-mentioned embodiment.Right
In structure and the details of the present invention, in the range of the technological thought of the present invention, those skilled in the art can carry out energy
Enough various changes understood.
Symbol description
1 ... pipe arrangement, 2 ... throttle orifice, 3,4 ... connecting pipe, 5 ... differential pressure transmitter, 6 ... acceptance division, 7 ... characteristic quantity
Operational part, 8 ... desired value operational part, 9 ... rate of change operational part, 10 ... detection unit, 11 ... datum characteristic storage part,
12 ... alarm output unit, 100 ... the blocking diagnostic equipment of connecting pipe.
Claims (8)
1. a blocking diagnostic equipment for connecting pipe, the blocking of its diagnosis connecting pipe, pressure will be rocked by described connecting pipe
Measure object pressure guide to pressure detecting portion, the blocking diagnostic equipment of described connecting pipe is characterised by, including:
Acceptance division, it receives the pressure data coming from described pressure detecting portion；
Characteristic quantity operational part, described acceptance division the time series of the pressure data received is divided into multiple interval, and obtains by it
Represent the characteristic quantity of the vibrating state of the described pressure in this interval each；
Desired value operational part, it is for each described interval, according to the described spy that the regular hour to this interval is interval
The amount of levying obtains the desired value of the blocked state representing described connecting pipe；
Rate of change operational part, it is for each described interval, the described index interval to the regular hour to this interval
Value carries out smoothing techniques, according to the difference each other of the desired value after adjacent interval smoothing techniques obtain adjacent interval it
Between the rate of change of desired value；And
Detection unit, it becomes relatively usual bigger value according to the rate of change of the desired value obtained by described rate of change operational part, right
The blocked state of described connecting pipe judges.
The blocking diagnostic equipment of connecting pipe the most according to claim 1, it is characterised in that
Described rate of change operational part uses rolling average to process the change obtaining described desired value as described smoothing techniques
Rate.
The blocking diagnostic equipment of connecting pipe the most according to claim 1, it is characterised in that
Described rate of change operational part uses method of least square to obtain the rate of change of described desired value as described smoothing techniques.
The blocking diagnostic equipment of connecting pipe the most according to claim 1, it is characterised in that
Described detection unit is according to the rate of change of the desired value obtained by described rate of change operational part with by described desired value operational part
The blocked state of described connecting pipe is judged by the desired value obtained.
5. a blocking diagnostic method for connecting pipe, the blocking of its diagnosis connecting pipe, pressure will be rocked by described connecting pipe
The pressure measuring object guide to pressure detecting portion, the blocking diagnostic method of described connecting pipe is characterised by, including following
Step:
Receiving step, it receives the pressure data coming from described pressure detecting portion；
Characteristic quantity calculation step, described receiving step the time series of the pressure data received is divided into multiple interval by it, and
Obtain the characteristic quantity of the vibrating state of the described pressure representing this interval each；
Desired value calculation step, it is for each described interval, according to the regular hour interval to this interval
Characteristic quantity obtains the desired value of the blocked state representing described connecting pipe；
Rate of change calculation step, it is for each described interval, the described finger interval to the regular hour to this interval
Scale value carries out smoothing techniques, obtains adjacent interval according to the difference each other of the desired value after adjacent interval smoothing techniques
Between the rate of change of desired value；And
Determination step, it becomes relatively generally bigger according to the rate of change of the desired value obtained by described rate of change calculation step
Value, judges the blocked state of described connecting pipe.
The blocking diagnostic method of connecting pipe the most according to claim 5, it is characterised in that
Described rate of change calculation step uses rolling average to process the change obtaining described desired value as described smoothing techniques
Rate.
The blocking diagnostic method of connecting pipe the most according to claim 5, it is characterised in that
Described rate of change calculation step uses method of least square to obtain the change of described desired value as described smoothing techniques
Rate.
The blocking diagnostic method of connecting pipe the most according to claim 5, it is characterised in that
Described determination step according to the rate of change of the desired value obtained by described rate of change calculation step and is transported by described desired value
The blocked state of described connecting pipe is judged by the desired value that calculation step is obtained.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012159328A JP5891138B2 (en) | 2012-07-18 | 2012-07-18 | Impulse tube clogging diagnosis device and clogging diagnosis method |
| JP2012-159328 | 2012-07-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103575482A CN103575482A (en) | 2014-02-12 |
| CN103575482B true CN103575482B (en) | 2016-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310303865.0A Expired - Fee Related CN103575482B (en) | 2012-07-18 | 2013-07-18 | The blocking diagnostic equipment of connecting pipe and blocking diagnostic method |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20140025317A1 (en) |
| JP (1) | JP5891138B2 (en) |
| KR (1) | KR101493162B1 (en) |
| CN (1) | CN103575482B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014181076A1 (en) * | 2013-05-04 | 2014-11-13 | Richard Steven | Flow metering |
| CN104214520B (en) * | 2014-08-28 | 2017-12-15 | 武汉光谷节能技术有限公司 | District cooling and heating transmission and distribution network health check system |
| US10288019B2 (en) * | 2016-07-21 | 2019-05-14 | Ford Global Technologies, Llc | Secondary system and method for controlling an engine |
| FR3107592A1 (en) * | 2020-02-21 | 2021-08-27 | Airbus Operations (S.A.S.) | Device for monitoring an aircraft drainage network and method for monitoring an aircraft drainage network |
| US20220308602A1 (en) * | 2021-03-25 | 2022-09-29 | Romet Limited | Fluid pressure monitoring system using flow data |
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| CN102169044A (en) * | 2009-12-21 | 2011-08-31 | 株式会社山武 | Pressure guiding tube blockage diagnosing device and blockage diagnosing method |
| CN102227620A (en) * | 2008-12-01 | 2011-10-26 | 株式会社山武 | Equipment for diagnosing blockage of lead pipe and method for diagnosing blockage |
| CN102879215A (en) * | 2011-07-15 | 2013-01-16 | 阿自倍尔株式会社 | Pressure guiding tube blockage detecting system and detecting method |
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| JP2711215B2 (en) * | 1993-11-29 | 1998-02-10 | アロカ株式会社 | Automatic dispensing device |
| JP3139597B2 (en) * | 1994-04-27 | 2001-03-05 | 横河電機株式会社 | Diagnosis device for blockage of pressure guide tube in pressure measuring device |
| JP3223501B2 (en) * | 1996-06-17 | 2001-10-29 | 横河電機株式会社 | Differential pressure measuring device |
| US7085686B1 (en) * | 1999-03-05 | 2006-08-01 | General Electric Company | Method and system for canceling noise and compressing data from a motor phase angle sensor |
| JP2008203000A (en) * | 2007-02-19 | 2008-09-04 | Yokogawa Electric Corp | Device and method for clogging diagnosis |
| JP2010009369A (en) * | 2008-06-27 | 2010-01-14 | Yokogawa Electric Corp | Field device |
| KR20110009469A (en) * | 2009-07-22 | 2011-01-28 | 현대건설주식회사 | Apparatus for seeking for clogging location in concrete supply pipe and method thereof |
-
2012
- 2012-07-18 JP JP2012159328A patent/JP5891138B2/en not_active Expired - Fee Related
-
2013
- 2013-07-15 KR KR20130082668A patent/KR101493162B1/en active IP Right Grant
- 2013-07-18 CN CN201310303865.0A patent/CN103575482B/en not_active Expired - Fee Related
- 2013-07-18 US US13/945,346 patent/US20140025317A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102227620A (en) * | 2008-12-01 | 2011-10-26 | 株式会社山武 | Equipment for diagnosing blockage of lead pipe and method for diagnosing blockage |
| CN102169044A (en) * | 2009-12-21 | 2011-08-31 | 株式会社山武 | Pressure guiding tube blockage diagnosing device and blockage diagnosing method |
| CN102879215A (en) * | 2011-07-15 | 2013-01-16 | 阿自倍尔株式会社 | Pressure guiding tube blockage detecting system and detecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140011267A (en) | 2014-01-28 |
| KR101493162B1 (en) | 2015-02-12 |
| US20140025317A1 (en) | 2014-01-23 |
| JP2014020897A (en) | 2014-02-03 |
| CN103575482A (en) | 2014-02-12 |
| JP5891138B2 (en) | 2016-03-22 |
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